--ref: http://searchsqlserver.techtarget.com/tip/0,289483,sid87_gci1334856,00.html
--귀찮아서 대충 했다.
use master;

create table #temp
(
	db_name nvarchar(255)
,	schema_name nvarchar(255)
,	table_name nvarchar(255)
,	memory_space_MB int
,	storage_space_MB bigint
,	percentage_of_object_in_memory numeric(18,2)
)

declare 
	@dbname nvarchar(500)
,	@sql nvarchar(4000)

declare cur cursor for
	select 
		name
	from sys.sysdatabases;

open cur;

fetch next from cur into @dbname
while @@fetch_status not in (-1, -2)
begin

	set @sql = '
		use ' + @dbname + ';
		select 
			db_name() dbname
		,	schema_name(sys.tables.schema_id) schemaname
		,	sys.tables.name tablename
		,	sum(a.page_id)*8/1024 as mmb
		,	sum(sys.allocation_units.data_pages)*8/1024 as smb
		,	case 
					when sum(sys.allocation_units.data_pages) <> 0 then 
						sum(a.page_id)/cast(sum(sys.allocation_units.data_pages) as numeric(18,2)) 
			end as ''obj_in_memory''
		from 
			(
			select 
				database_id, 
				allocation_unit_id, 
				count(page_id) page_id 
			from sys.dm_os_buffer_descriptors 
			group by database_id, allocation_unit_id) a
				inner join sys.allocation_units 
					on a.allocation_unit_id = sys.allocation_units.allocation_unit_id 
				inner join sys.partitions 
					on (sys.allocation_units.type in (1,3)
					and sys.allocation_units.container_id = sys.partitions.hobt_id)
					or (sys.allocation_units.type = 2 
					and sys.allocation_units.container_id = sys.partitions.partition_id)
				inner join sys.tables 
					on sys.partitions.object_id = sys.tables.object_id
					and sys.tables.is_ms_shipped = 0
		where a.database_id = db_id()
		group by schema_name(sys.tables.schema_id), sys.tables.name
		';
		insert #temp exec(@sql);
		fetch next from cur into @dbname
end

select 
	db_name
,	schema_name
,	table_name
,	sum(memory_space_MB) memory_space_MB
,	sum(storage_space_MB) storage_space_MB
,	sum(percentage_of_object_in_memory) percentage_of_object_in_memory
from #temp 
where memory_space_MB > 0
group by 
	db_name
,	schema_name
,	table_name
union all
select
	'TOTAL'
,	''
,	''
,	sum(memory_space_MB) memory_space_MB
,	sum(storage_space_MB) storage_space_MB
,	sum(percentage_of_object_in_memory) percentage_of_object_in_memory
from #temp 
where memory_space_MB > 0

drop table #temp
close cur;
deallocate cur;